My problem was Linux. My bad. I thought Firefox was Firefox regardless the underlying OS. I logged in with a friend's Windows machine and the sign in worked. I ...

zedhed1256. I'm back.After posting the above message, I cleared my cache and cookies on this new copy of Firefox, restarted my browser and still can't login to ...

Strange. I think many of us are having the same problem: I was easily able to create a new, first-time account. I immediately tried to sign in using the usernam...